Pronounced Face-Buh-Fish-Uhl. Means Facebook Official, as the name suggests. This can be used to describe any information that can be posted on Facebook. This includes relationships, marriage, children, musical preference, sexual preference, etc.
Guy 1: "Did you hear that attractive female you've been obsessing about is in a relationship?"
Guy 2: "Really? Is it Facebofficial?"
Guy 1: "I don't think so."
Guy 2: "Then she's clearly still single"